1. Electrostatics and Electricity

2. Electrostatics Electrostatics is the study of electric charge
Electric Charge-is described as electron movement. Electrons can transfer from one object to another
Two types of charges + and –
Like charges__________
Opposite charges________
How objects become electrically charged is by transfer of electrons

3. There are two types of electron transfer
Conduction- is process of charging a neutral body by touching it with a charged object
Induction-process of a charge induced by close proximity to the charged object
Electroscope- is a device that detects electric charges

4. Conductor – is a material in which electrical charges flow easily (ex
Insulator – is a material in which electrical charges do not flow easily (ex. ____________)
Polarization – the process of rearranging the charges already present on an object to create a temporary charge

5. Lightning

7. Van de Graff Generator

8. Coulomb’s Law
Coulomb’s Law – the magnitude of electric force between two charges is directly proportional the magnitude of the charges and inversely proportional to the square of the distance between the charges.

9. Coulomb’s Law Cont.
* a negative force means they were attracting charges
*a positive force means they were repelling charges
*Coulomb’s Constant =KC= 8.99 x 109 Nm2/C2

10. Coulomb’s Law Cont.
An electron with a charge of 1.60x10-19 C is .10m from a proton with a charge of
1.60x10-19 C . What is the electric force
between the two charges?
Felect =???
Q1 = x 10-19
Q2 = x 10-19
d = .10m

11. Coulomb’s Law Cont.
Two balloons are charged with an identical quantity and type of charge: x 10-9 C . They are held apart at a separation distance of .617 m. Determine the magnitude of the electrical force of repulsion between them.

12. Circuit Schematics
Schematic – a diagram that uses symbols for components of an electrical circuit

13. Types of Circuits
Series circuit – all current travels through each electrical component in one path (ex. Christmas lights)
Series formulas
VT = V1+V2+V3…..
IT = I1=I2=I3…..
RT = R1+R2+R3…..

14. Types of Circuits
Parallel circuit – a circuit with several paths of current
Parallel formulas
VT = V1=V2=V3…..
IT = I1+I2+I3…..
1/RT = 1/R1+1/R2+1/R3…..

15. Ohm’s Law Electric current – the flow of charge.
Electrons flow around a closed loop called a circuit
Electric current is measured in amperes (amps; 1A=1 amp)
The symbol of current in the equation is I

16. Ohm’s Law Voltage – the potential difference in electric charge.
Voltage is measured in volts (V)
The symbol for voltage is V

17. Ohm’s Law
Resistance – property that determines how much current will flow through a circuit
Resistance is measured in ohms (Ω)
The symbol for resistance is R in the equation
All conductors offer some resistance

18. Ohm’s Law
I=V/R; this is relationship ohm discovered
V=IR